int sumOddLengthSubarrays(int* arr, int arrSize) 
{
    int sum = 0;
    for (int start = 0; start < arrSize; start++) 
    {
        for (int length = 1; start + length <= arrSize; length += 2) 
        {
            int end = start + length - 1;
            for (int i = start; i <= end; i++) 
            {
                sum += arr[i];
            }
        }
    }
    return sum;
}
